Improvement in nut-lock



attent (twine.

OSWALD S.'FREELAND, OF NEWPORT, RHODEISLAND,

Letters Patent No.100 ,023, dated Febtary 22, 1870.

IMPRovEMENTl IN NUT-Lock.

The Schedule referred to in these Letters Patent and making p ai't of the same.

To all whom it may concern:

Be it known that I, OSWALD S. FREELAND, of N ewport,`in thecounty of Newport, and State of Rhode island, have invented a new and usei'ul Improvement in Lock-N uts; and l do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the salue, reference beinghad to the-accompanying drawings forming part of this specification, in Which- Figure 1 is a side view of a bolt to which my imy provemeut has been attached, partlyin section through the uut.

Figure 2 is a detail sectional view of the same taken through the line :c z, fig. 1.

similar letters of rete-rence indicate corresponding,r parts.

My invention has for its object to furnish a simple, convenient, and etieetive lock-uut for bolts upon machinery, and in other places where they will be exposed to jarring, to prevent the said nuts tiom being worked oit' or loose by said jarring; and

1t consists in the construction and combination of various parts of the nut, as hereinafter more fully described.

A is the nut, which is made in three parts, the two outer parts being formed with screwthreads fitting into the threads ot the bolt B.

lhe inner diameter of the central part of the nut is made considerably larger than that of the outer parts, so that there may be a space left between the said part and the bolt B, as shown iu figs. 1 and 2.

Upon the inner surface of the central part are formed a series o1' ratchet teeth, C, as shown iu fig. 2.

l) is a shortstem placed in a groove, b', formed for its reception in the side of the bolt B, as shown in rigs. 1. and2.

To the inner end of the stem D is rigidly attacheda pawl, E, of such a length that when turned into the proper position it may engage with theiteeth C, and thus prevent the nut from being turned off.

The pawl E is held in contact with the teeth O by the spring F, one end of which is attached to the pawl E, and its other end rests against the side ot' the bolt B at a distance of about one-third ofthe circumference of the said bolt from the groove` b' formed in its side, i

In the other end ot' the stem D is formed ahole to receive the point of an awl or other suitable toolto slightly turn it to withdraw the pawl E from the teeth C and allow the nut to be turned off.

When the nut is detached from the bolt the pawl E and spring F may be' readily placed in and removed from the cavity of the uut.

\Vhen start-ing the uut upon the bolt, the stem D should be held iu the groove b' until the nut has been turned around once or twice, so that the stem D may not get between the. threads'of the bolt and nut and bind.-

the inner surface oi' its recessed middlel part, substan-v tially as herein shown and described, and for the purpose set forth.

2. rlhe stem D, pawl E, and spring F, in combination with the grooved bolt B and lint A, constructed substantially as herein shown and described, and for the purpose set forth.

OSWALD S. FREELAND.

Witnesses:

CHABLES N. TILLEY, JOHN HENRY TILLEY. 

